1388 METASPERMAE OF THE MINNESOTA VALLEY. 
North America: N. S., Q., Ont. to L. Huron and Sas- 
katchewan; S. to N. J. and Fla.; W. to Minn., Ark. and Tex. 
Minn. valley: N. H. and N. district; forest lakes; local 
and infrequent. 
HETERANTHERA Rutz and Pav. Prodr, 9, t, 2 (1794). 
Schollera ScHREB. Gen. Pl. II, 785 (1791) not Roth (1788). 
Leptanthus Micux. Fl. Bor.-Am. I, 24 (1803). 
Buchosia VEutoz. Fl. Flum. 33 (1827). 
Benth. and Hook., Gen. Pl. ITI, 838; Durand, Ind. Gen. Phan. 433; 
Engler and Prantl, Nat. Pflanz. 2,1V,74 (Schénland); O. Kuntze, Rev. Gen. 
II, 719. \ 
Living species: 9; tropical Africa; N. and S$. America. 
N. America, 3-4; California, 1; S. Sts., 1; Canada, 1; E. Sts.,°3. 
Heteranthera dubia (Jaca.). 
Commelina dubia JAcQ. Icon. (1768). 
Schollera graminifolia WILLD. Nov. Act. Soc. Berl. IIT, 438 (1801). 
Leptanthus gramineus Micux. Fl. N. Am. I, 25 (1803). 
Heteranthera graminea VAHL, Enum. II, 45 (1806). 
Schollera graminea BARTR. FI. N. Am. II, 54 (1822). 
S. dubia OK. Rev. Gen. II, 719 (1891). 
Wats. and Coult., Gray’s Man. 6 ed. 536; Britt., Fl, N. J. 247; Mac., Fl. 
Can. II, 54; Upham, Fl. Minn, 149; Chap. FI]. S. St. 497; Engl. Schénl., Nat. 
Pfianz. II, 4, 74; Wats., Fl. Calif. 1], 187; Wats., King. Exp. 359; Cov., Fl. 
Ark. 226. 
Cuba. 
North America: Ont. and Ott. to N. Eng., N. J. and 
N. Car.; W. to Minn., E. Kan., Ark. and Tex.; also, Oregon 
and California. 
Minn. valley: Throughout; mud beside lakes or 
streams, or completely aquatic. 
HERB.: Sheldon 718, Sleepy Eye; Sheldon 1430, Lake 
Benton; Sheldon 818, Sigel township, Brown Co.; Sheldon 1135, 
Springfield; Sheldon 1508, Lake Benton; Taylor 987, Glenwood; 
MacMillan 19, Morton; Herrick 818, Minneapolis; Oestlund 208, 
Minnehaha; Sandberg 596, Belle Creek. 
XVI. JUNCACEAE. Rush Family. 
Endlicher, Gen. Pl. 130(1840); Benth. and Hook., Gen. Pl. III, 861 (1883); 
Buchenau in Engler and Prantl, Nat. Pflanz. 2, V, 1 (1887). 
Genera; 7; 2, cosmopolitan; 5, southern hemisphere. 
Species: 190 +; 5-6, extinct. 
JUNCUS Linn. Gen. 295 (1737) p. p. 
Tenagaia Reicu. Ic Fl. Germ. LX, 22 (1847), 
Cephaloxys Desvx. Journ. Bot. I, 324 (1808). 
